I'm using a D-Link DCS-1000 IP Camera

It's an older model but it still works good The only drawbacks are the fixed retina and the manual focus ring on it. It is designed for interior use so it does not handle sunlight very well. This is not a wireless IP camera so I use a Linksys wireless router with hacked firmware. The router connects wirelessly to my Linksys WRT54G Wireless router. I gave the camera a static IP and use port forwarding on the router to access it from the internet. It took me a few long nights to get it all configured but once its up and running, it stays that way.

Here are some pictures of my setup :

My wife hates it in her kitchen window but I usually hide it behind a plant or something .....